[Do Not Merge] Add Decap CMS

[noahc3]

Description of Changes

• Add landing page for Decap CMS
• Configure Decap to utilize our existing blog structure and perform authentication via a self-hosted backend.

Related Issues

Type of Change

• New feature or content (non-breaking change which adds functionality)

Pre-review Checklist

• I have performed a self-review of my code or content and did not note any bugs or grammatical errors
• I have added thorough code comments, tests, and documentation where and when applicable
• I have ensured that the all sections of this PR template are accurate and complete following the applicable instructions

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Reviewer Checklist

To be completed by the independent reviewer:

• Perform a review of the site using the CloudFlare pages preview URL
• Test all functionality that this code change could impact
  • Ensure grammar and content meets all current guidelines
  • Request changes if needed
  • Approve review if PR template is complete, no issues found, and all build steps have passed without error

Read more about the Pull Request Review Process

[GlitchWitch]

🎉 Snyk checks have passed. No issues have been found so far.

✅ security/snyk check is complete. No issues have been found. (View Details)

[cloudflare-workers-and-pages]

Deploying glitchsecure with    Cloudflare Pages

Latest commit:	acadd54
Status:	✅  Deploy successful!
Preview URL:	https://2c2a9aa2.glitchsecure.pages.dev
Branch Preview URL:	https://add-decap-cms.glitchsecure.pages.dev

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